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Date of Publication:2003-01-01

Journal:光电子 激光

Issue:5

Page Number:534-537

ISSN No.:1005-0086

Abstract:The cavity enhanced absorption spectrum(CEAS) was carried out with a newly developed tunable optical parametric oscillator(OPO).A linear cavity was used in the experiments.Light transmission through the cavity was obtained by jittering the cavity-length with a piezo on one of the mirrors.The sensitivity of the system was determined by recording the absorption of ethane(C2H6) at 2.996 μm.A minimum detectable absorption coefficient of 2.3×10-5 cm-1 was achieved with a total mirror reflectivity of 98.5 %,corresponding to an C2H6 detection limit of 690 ppb.

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